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technetium
(Encyclopedia)technetium tĕknēˈshēəm [key] [Gr. technetos=artificial], artificially produced radioactive chemical element; symbol Tc; at. no. 43; mass no. of most stable isotope 98; m.p. 2,200℃; b.p. 4,877...nihonium
(Encyclopedia)nihonium nĭhōˈnēəm [key], artificially produced radioactive chemical element; symbol Nh; at. no. 113; mass number of most stable isotope 284; m.p., b.p., sp. gr., and valence unknown. Situated in...element
(Encyclopedia) CE5 element, in chemistry, a substance that cannot be decomposed into simpler substances by chemical means. A substance such as a compound can be decomposed into its constituent elements by means o...moscovium
(Encyclopedia)moscovium mŏskōˈvēəm [key], artificially produced radioactive chemical element; symbol Mc; at. no. 115; mass number of most stable isotope 288; m.p., b.p., sp. gr., and valence unknown. Situated ...Yarra
(Encyclopedia)Yarra, river, 115 mi (185 km) long, rising in the Great Dividing Range, S Victoria, Australia, and flowing generally westward through Melbourne to Port Phillip Bay. It is important to the water supply...Antioch, city, United States
(Encyclopedia)Antioch, city (2020 pop. 115,291), Contra Costa co., W Calif., on the San Joaquin River near the mouth of the Sacramento; inc. 1872. It is a processing and shipping center for the agricult...Kimberley, town, Canada
(Encyclopedia)Kimberley kĭmˈbərlē [key], town (1991 pop. 6,531), SE British Columbia, Canada. Canada's highest city (3,660 ft/1,115 m), it is the site of the Sullivan mine, where large quantities of silver, lea...Tacna
(Encyclopedia)Tacna, city (1993 pop. 115,633), capital of Tacna dept., S Peru, on the Río Caplina. Tacna is an agricultural center that produces tobacco, grapes, cotton, and sugarcane. It is on the Pan-American Hi...Hungry Horse Dam
(Encyclopedia)Hungry Horse Dam, 564 ft (172 m) high and 2,115 ft (645 m) long, NW Mont. on the southern fork of the Flathead River. A major unit in the development program for the Columbia River basin, it was built...Montauk Point
(Encyclopedia)Montauk Point mŏnˈtôkˌ [key], eastern extremity of the south peninsula of Long Island, SE N.Y. Approximately 115 mi (190 km) E of Manhattan, it is the easternmost point of the state. It has been t...Browse by Subject
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